Bunch building mechanism



June 26, 1951 G. E. R'EPAss 2,558,198

BUNCH' BUILDING MECHANISM Filed April 50, 1947 8 Sheets-Sheet 1 Uli-Ulliillllll IIIIIII url-plu G. E. REPASS BUNCH BUILDING MECHANISM June 26,1951 Filed April so, 1947 8 Sheets-Sheet- 2 INVEIG ,y a BY 5 June 26,1951 G. E. REPAss BUNCH BUILDING MECHANISM 8 Sheets-Sheet 5 Filed April50, 1947 June 26, 1951A G, E REPASS y 2,558,198

BUNCH BUILDING MECHANISM Filed April 50. 194

8 Sheets-Sheet 4 June 26, 1951 G. E. REPAss BUNCH BUILDING MECHANISM 8Sheets-Sheet 5 Filed April 50, 1947 INVENTOR.

L() In June 26, 1951 G. E. REPAss BUNCH BUILDING MECHANISM Filed April50, 1947 8 Sheets-Sheet 6 INVENTUR June 26, 1951 G. E. REPAss BUNCHBUILDING MECHANISM 8 sheets-sheet 7' Filed April 30, 1947 1N VEN TOR.

/Cf M Zaun/w G. E. REPASS BUNCH BUILDING MECHANISM June 26, 1951 8Sheets-Sheet 8 Filed April 30, 1947 INVENTOlRu -nism is located at therear of the frame.

Patented June y26, 1951 2,558,198 UNCH BUILDING MECHANISM George E.Repass, Hopedale, Mass., assigner to Draper Corporation, Hopedale,Mass., a corporation ofMaine Application April 30, 1947, Serial No.744,821

22 Claims. (ci. 24e-443.7)

This invention relates to spinning, and more particularly to an improvedbuilder mechanism of the type employed in spinning frames to form a topbunch oi filling on a bobbin tip.

After a bobbin has been made on a spinning frame, it is customary toinstall a number of vthese bobbins by hand in a bobbin battery whereeach free end of filling is held preparatory to transfer to -a-shuttle.Hand installation involves considerable labor and as a result there hasdeveloped a demand for more efcient or less costly bobbin installation,preferably such as may be serviced by automatic conveyors or feedingmechanisms. To facilitate mechanical handling of bobbins, it has beenproposed to form, at the tip of the bobbin, a top bunch of lling whichmay be easily engaged by mechanical grippers and which is easily slippedofi over the bobbin extremity to provide a free end. Top bunch buildermechanisms heretofore provided for this purpose have provenunsatisfactory, owing to a combination of factors.

Such builder mechanisms depend upon raising the ring rail into anextreme elevated position to form a top bunch. In lowering the ring railto a starting position, breaking of the filling occurs very frequently.Some top punch builder mechanisms which have sought to avoid this latterdifculty are of such a cumbersome nature as to discourage their use.made greater by reason of the .tact that conventional spinning frameconstruction leaves only a limited amount or" space between itself andthe supporting iioor for mounting and operating the builder mechanismthe conventional lling cam and draft chain construction of which cannotbe altered -for practical reasons. It will readily be seen thereforethat additional structure to carry out new builder movements is greatlylimited by the space available. t should also be observed that there issome variance in the several standard types of frame. Thus in the wellknown Whitin frame design, the builder mechanism is arranged at thefront of the frame while in the Saco-Lowell type of frame the buildermecha- The result of this is to limit even further the design of abuilder mechanism which is adapted for use with both typesof frame.

An object of the invention therefore is to deal with the problemindicated, and to provide an improved builder mechanism of very compactnature by means of which a top bunch of filling may be smoothly formedon a bobbin ina position to facilitate either manual or automatic Thediiculty here is handling and installation of the bobbin in a loombobbin battery.

It is also an object of the invention to combine the operation ofbuilding a top bunch with other desirable builder movements such asthose relating to building a reserve bunch of lling, to eliminate handoperations in resetting pick wheel mechanism, to return the ring rail toa starting position and the like. Other objects and novel features willappear from the following description of the invention.

In the accompanying drawings:

Fig. 1 is a front elevational view illustrating the builder mechanism-ofthe invention mounted in a spinning frame;

Fig. 2 is a side elevational view illustrating driving means locatedinthe frame;

Fig. 3 is an elevational view further illustrating the driving means forthe builder mechanism;

Fig. 4 is a perspective View of the builder mechanism removed from theframe;

Fig. 5 is a View of the builder in side elevation;

Fig. 6 is another elevational view of the builder viewed from anopposite side;

Fig. 7 is a detail perspective view further illustrating the cam membersof the invention;

Fig. 8 is a detail perspective view of clutch mechanism;

Figs. 9-13 inclusive are elevational views of cam members;

Fig. 14 is a fragmentary detail perspective view of a ring rail andbobbin; and

Fig. l5 is a fragmentary view `of a bobbin with a top bunch formedthereon.

I have found that when building a top bunch, thread breaking may bealmost entirely eliminated if the filling leading from the top bunch tothe ring rail traveler is at all times protected from excessive tension.This I nd can be achieved by providing an automatic ring rail loweringmechanism, and by combining with this mechanism a novel top bunchbuilder mechanism which is timed to perform its function immediatelyafter completion of the main package and just before the ring rail islowered so that the two operations are blended one into another.

The general plan of my improved builder mechanism includes a buildinglever with Which is associated the well known lling cam construction anda pick motion of the type common to builder mechanisms. I have furthercombined with the building lever a supporting bracket arranged inspaced-apart relation to the lever and securl so that the two elementscon,

3 stitute a frame. In this frame are very compactly arranged a series ofunique cam members operating in timed relation to one another andoperatively connected to driving gear means by means of which the topbunch building movement is most effectively brought into action during asuccession of builder movements. This general structure by means of itsexceedingly well integrated nature is well adapted vfor use with any ofthe common makes of spinning frames. The specic form of builderillustrated in the drawings is especially designed for use with aspinning frame of the type manufactured by the Whitin Machine Works, andthe following detailed description is rendered with reference to thelatter type of frame.

Referring more in detail to the drawings, Fig. l illustrates a spinningframe showing bobbins of roving running through the drafting rolls downthrough the usual thread guides. The strands are passed throughtravelers I, rotatably mounted in rings in a ring rail 3, and thenaround the bobbins 5. A builder mechanism makes a main package on thebobbins by means of va traversing action of the ring rail, with eachsuccessive 'reciprocation being advanced upwardly to provide a pluralityof overlapping layers. The builder mechanism is indicated at the lowerleft-hand side of Fig. l and operates a link mechanism which in turnraises and lowers the ring rail.

Rigidly supported between the frame and an upright extending outwardlyfrom the bottom of the frame is a shaft 36, Figs. 4 and 5, on which ispivotally mounted a building lever 2 which carries at kone extremity arod and counterweight normally tending to maintain this end of the leverin a relatively lower position than its opposite end. Mounted in thebuilding lever 2 is a shaft 4 (Fig. 6) which has a bevel gear t slidablymounted at one end. At the opposite end of shaft 4 is secured a pickwheel 8. A trundle roll 34 is'mounted on a stub shaft 35 supported in aroller stand 54 adjustably secured at one side of the building lever 2.The trundle roll is acted upon by a lling cam Il which causes thebuilding lever to rock on shaft 3B. The cam |I is xed to a shaftllijournaled through the frame.

At a point outside the frame, the shaft 'I6 has xed thereon a gear Illedriven by a worm IUI on l a vertical shaft |02 (Fig. 3). Motive powerfor driving the shaft |82 is supplied by a motor located at an oppositeend of the frame from that shown in Fig. 3, acting through a gear trainrunning from gear |03, to chain |04, to jack gear |05. On the same shaftwith jack gear |95 is a small gear |06 driving a large intermediate gear|07 which in turn drives gears IBS, II, |I2 and a bevel gear rotatabletherewith and in mesh with a bevel gear H4 on the upper end of shaft|62.

At one side of the building lever and in spacedapart relation thereto Ihave provided a bracket 2S (Fig. 4), consisting of a forwardly extendingmember which vcorresponds somewhat in length 'and shape to the forwardend of the building lever, an upright section, and a rearwardlyextending arm. The bracket is mounted on one end of a stub shaft 24 theother end of which is received in the building lever 2. The buildinglever bracket and stub shaft combine to provide a 'supporting frame.Within this frame and fixed tothe s tub shaft is a worm wheel I2 drivenby a worm I0,'keyed to the central portion of shaft 4 immediately abovethe worm wheel. The worm wheel is constructed with an extended hub por-4 tion surrounding the stub shaft 24 and upon which is mounted a seriesof cam elements consisting of spaced-apart cams I4, IE and I8, and twoadjustable timing discs 20 and 22 secured in timed relation to oneanother.

As the trundle roll 34 is acted upon by the lling cam II and the buildermoves up and down on shaft 3E, the pick wheel is slowly rotated by meansof a conventional pawl I3. A second hold back pawl I1 maintains the pickwheel in whatever position it is moved by the action of the pawl I3.This pick movement is adjustable to vary the amount of rotation of shaft4 and, being of conventional character, requires no further discussionhere.

Rotation of the pick wheel and shaft 4 a few degrees with eachoscillation of the builder actuates the worm I0 and worm wheel I2, thusturning the cam I4 and other members on shaft 24 a short distance. Thecam I4 engages against a cam roller 38 (Fig. 6) carried by a lling arm4i) pivotally mounted on a stub shaft IS. Shaft I9 is supported at oneend in the builder lever 2 and at the opposite end in the bracket 26(Fig. 4).

The lling arm 4t is formed with a slotted extremity in which isadjustably secured a slide 2| attached to which are link members 28, 30and 32. The latter link member 32 has its upper extremity connected to adraft chain 23 which is in turn fastened to a conventional ring raillifting mechanism consisting of arms 25 and 2'I and ring rail lifter rod29 (Fig. l).

As the builder moves up and down, the lling arm 43, therefore, throughthe link mechanism and chains, imparts a traversing motion to the ringrail which advances progressively, thus laying each layer of fillingslightly higher than the preceding layer, in response to the pick wheelmovement until the bobbin is filled to a predetermined point.

In accordance with the invention, I combine with the builder movementsnoted, mechanism for building a top bunch of lling immediately the mainpackage has been completed. This mechanism includes the cams I and I8,timing discs 2) and 22 already referred to, and several other elements.The timing discs are formed with annular rim portions which are arrangededge to edge to provide a space between the two discs. Each of the rimportions is further cut away along adjacent points to form a slot 3|.The inner sides of the discs are formed with cam surfaces 32a, 33 (Figs.9 and 10).

Engaging against the rim portions of the discs 2|) and 22 is a timingarm 42 provided with a beveled head which slides on the rim portions andis of a size suitable for allowing this member to pass through the slot3|. The opposite end of the timing arm 42 is secured to a timing armsupport 44 pivotally mounted on a stub shaft 31 in the building lever 2.The timing -arm support 44 is formed with a forked portion whichsurrounds the shaft 4 and engages against the gear '6 (Fig. 6). f

The timing discs 2G and 22 are arranged on the shaft 2li in a positionso chosen that at the point where the main body of filling is completedon a bobbin, the beveled head of the timing arm 42 may drop through theslot 3|, moving the timing arm support 44 relative to the shaft 4 whichengages the bevel gear 6 with a bevel gear 46. The gear 46 is mounted ona shaft 39 and is constantly driven by means of a sprocket 4| and chain43 which is in turn `driven from the gearing already referred to,located at the end of the spinning frame.

When the two gears mesh the shaft 4 is rotated more rapidly than by thepick wheel 8. This rotates the cams at a relatively faster rate and ascam I8 turns it allows a timing cam follower lever 43 to drop, rotatinga shaft 50 to which it is keyed. The shaft 50 is received through thebuilding lever and has keyed to its opposite ends a trundle roll controlmechanism 52. This mechanism consists of a link adjustably fastened atits intermediate portion to a slotted lug 45 and, at its extremity, isdetachably secured to the trundle roll stand 54.

VWhen shaft is rotated as the roll on arm 48 follows the contour of camI8, the control member 52 is pivoted downwardly, thus lowering thetrundle roll stand 54 and allowing trundle roll 34 to drop away from thefilling cam II. This permits the ring rail to rise until arm 25 hits anadjustable stop on the spinning frame and thus builds atop bunch 4l asshown in Fig. l5. A small number of turns are applied to the bobbin withthe ring rail in this position, for example twelve turns, and means arethen resorted to for lowering the ring rail without 4delay and beforethe spinning frame is knocked off.

Return of the ring rau while the frame is Suu in motion is controlled byrotation of the cam I4, which as it turns, forces the filling arm 40downwardly thus permitting the ring rail to descend. Cam IB alsocontacts a cam roller 56 fastened to a Cam follower support 58, in turnsuspended from a cam shaft bearing member El! (Fig. 4). This forces thebuilding lever down to a still lower point and thus carries the ringrail below the butt of the bobbin, at which point the operation of thespinning frame may be halted.

Cam I8 is provided with a knock-off pin 62 adjustably xed on its outerrim. As the cam revolves in timed relation to movement of the cam I6against the roller 56, this pin comes into contact with a knock-offlever end BS adjustably 'mounted in a knock-off lever 64, forcing itdownward. Knock-olf lever 64 pivots on a stud I9 and its outer end isconnected to knock-off rod 68 which operates the knock-offymechanismvfor the spinning frame.

During that part of the movement of cam I6 just described, this cam alsoplaces in an operative position a bunch builder quadrant mechanism forforming a reserve bunch of lling when the frame is again started. Thequadrant mechanism includes a slotted annular segment 1ocated slightlyabove and at one side of the worm Ill. Within the slotted portion of thesegment 55 is adjustably secured a sliding block 51 from .which issupported a hub 82 carrying a quadrant member '12. The quadrant isnormally held in a forward inoperative position against the action of acoiled spring carried inside of the hub S2, by means of a quadrant pawl'IIL A quadrant driving gear 'I4 is xed to the filling cam shaft I6 in aposition adapted to engage a serrated edge of the quadrant asillustrated in Fig. 4.

During the movement of cam I6 occurring as the ring rail reaches itslowest position above described, a portion of the cam moves against aprojection on the quadrant pawl 19, tripping this member and allowingthe quadrant to spring rearwardly into an operative position.

When the building lever is at its lowest position, a notched latchattached to the treadle on the ring rail, locks the rail in place in thewell known manner. After the completed bobbins are 6 doffed, the rail isreleased by tripping the latch attachment from its locked position,leaving the spinning frame in position to start on a new set of bobbins.

As the frame is started with the builder in the lowest positiondescribed, the bevel gears 45 and 6, which are still in mesh, continuetorrevolve the cams rapidly. `A portion of cam I4 presents a sinuoussurface, and as this surface comes into contact with the filling armroll 38, there is imparted to the ring rail an oscillating motion ofvery brief duration. The effect of this oscillating motion is to crossthe yarn and tie it around the spindle at a point below the butt of thebobbin and at a time just prior to the beginning of building a reservebunch at the lower end of the bobbin, as shown in Fig. 14.

An interval, suitable for this oscillating motion to tie the yarn aroundthe spindle, is provided by the movement of the quadrant 12. At thecompletion of the oscillating movement, the bunch builder quadrant 12contacts the quadrant driving gear "I4, keyed to the cam shaft 16. In sodoing the quadrant holds the trundle roll` 34 out of full contact withthe filling cam II. As the quadrant driving gear 'I4 and quadrantserrations are engaged, there is also imparted to the builder a.definitely limited traversing motion which builds a reserve bunch oflling around the bobbin. This operation is terminated by forwardmovement of the quadrant, which turns with the quadrant driving gear. Assoon as the quadrant reaches an inoperative position, it is locked thereby the quadrant pawl 1B. When the quadrant moves ahead into thisinoperative position, the trundle roll 34 moves into full contact withthe filling cam I I and the usual traversing action already describedtakes place until the main package is made.

Also provided is a stop pin 'I8 adjustably mounted in the quadrant in aposition arranged to Contact an adjustable 'stop pin 80 mounted in thebuilder frame. This stop pin controls the distance that the quadrantmoves back under the driving gear and this determines the size of thereserve bunch of filling.

With further rotation of the cams I4, I6, I8, the timing arm 42 isforced against the camming surface 32a, 33 on the timing disc 2B, and isthus raised, disengaging the bevel gear from bevel gear 45S. This thenleaves the shaft 4 to be revolved by the pick mechanism described above.

A safety mechanism is provided which allows the timing arm 42 to dropand' engage the bevel gears 46 and E only on the upstroke of thebuilder, thus assuring the same size bunch at the tip of each bobbin. Asthe builder rises, the timing lever latch 84, with the timing leverlatch release 8S at its upper end, rises until Contact is made with thelatch trip bracket 8B, which carries the latch out from under the pin 96mounted on the timing arm 42 and allows the arm to drop between thetiming discs. Movement of the timing arm between the discs can onlyoccur after the slot 3i has come beneath the end of the arm during therotation of the discs. The setting of the parts is such that the latchdoes not trip to release the lever until the slot 3| would permit ittodrop; then it does function to assure that the change of gears occurs onthe upstroke of the ring rail.

An important aspect of the mechanism del scribed is the carefullycontrolled movement occurring smoothly and in rapid succession toelevate the ring rail into a top bunch builder i position and then startit back without breaking the filling. These movements are made possibleby the combination of slotted cam discs and cam arm together with chaindriving means for actuating a filling cam follower control. It should beobserved that abrupt movement of the mechanism is avoided by camming thebuilder mechanism to raise the rail as the trundle roll drops away andpermits the building lever to move to a higher position and to remainthere just long enough for the tip bunch to be wound. With this there isalso combined additional cam means for very gradually starting the ringrail downwardly without any sudden start such as would place a strain onthe filling.

It is also pointed out that the same cams cooperate to carry outtheoperation of passing a few turns of filling around the bottom of thebobbin and simultaneously place the quadrant mechanism in an operativeposition to build a reserve bunch. The various other movements describedplace the frame in position to resume operation without any handadjustments being necessary.

The arrangement of the cam elements with the bracket as described isespecially desirable in modifying the operation of the builder forinstallation on a Saco-Lowell type of builder. Thus the entire camassembly can be used in an inverted position and when changed in minorstructural respects becomes easily adapted to this type of frame.

It will be evident that by mounting the several cam elements on a commonsupporting member extending laterally out from one side of the buildinglever and yet not projecting below it to any appreciable extent, arelatively small amount of operating space is necessary and installationin the spinning frame is facilitated. It is-intended that variouschanges and modifications may be resorted to in keeping within the scopeof the invention as defined by the appended claims.

I claim:

l. A builder mechanism for a spinning vframe comprising a shaft, abuilding lever mounted on the shaft, means including a trundle roll andfilling cam for oscillating the lever about vthe shaft to form a mainpackage of filling on a bobbin, cam means for lowering the truncle rollout of contact with the filling cam for a short interval during which atop bunch is built, and cam means for immediately lowering the buildinglever while the spinning frame is in mot-ion.

2. A builder mechanism for a spinning Yframe comprising a building levermounted on a shaft in the spinning frame, a trundle roll secured to thelever, a lling cam supported from the spinning frame, said cam beingada-pted to eng-age against the trundle roll and effect oscillation ofthe lever about its shaft, a filling arm operatively connected to a ringrail in the said `spinning frame and responsive to movement of thebuilding lever, a pick actuated mechanism for controlling the traverseof the filling arm to build s a main package of overlapping layers ofVfil-ling on a bobbin, means for increasing the speed of the pickactuated mechanism, cam means rotated by the pick actuated mechanism,said cam means being effective when operating at a relatively fasterspeed, to lower the trundle roll away from the filling cam and cause thebuilding lever and ring rail tomove toa bunch building position.

3. A builder mechanism for a spinning frame comprising a building levermounted on a shaft in the spinning frame, a trundle roll secured to thelever, a filling cam supported from the spinning frame, said cam beingadapted to engage against the trundle roll and effect oscillation of the`rever about its shaft, a lling arm operatively connected to a ring railin the said spinning frame and responsive to movement of the buildinglever, a pick actuated mechanism for controlling the traverse of thefilling arm to build a main package of overlapping layers of filling ona bobbin, a cam supporting stud mounted at one side of the buildinglever, cam disc members defining a slot between them mounted on the camsupporting stud, a timing arm having a widened head engaging said discmembers, means operatively connected to the timing arm and comprisingdisengageable gears for increasing the speed of the pick actuatedmechanism, a second cam follower lever engaging against a second camlocated at one side of the said `cam discs, said second cam followerlever having means effective upon movement thereof to lower the trundleroll and move the building lever into a top bunch building position, anda third cam means mounted on the cam supporting stud for lowering theentire building mechanism subsequent to building a top bunch.

4. A builder mechanism for a spinning frame comprising a building levermounted on a shaft in the spinning frame, a trundle roll secured to thelever, filling cam means adapted to engage against the trundle roll andeffect oscillation of the lever about its shaft, a filling armoperatively connected to a ring rail on the said spinning frame andresponsive to movement of the building lever, a supporti-ng studprojecting laterally from the building lever, a pick actuated motionadapted to change the traverse of the filling arm with respect to thebuilding lever to build a main package on the bobbin, a worm wheelmounted on the stud, said worm wheel presenting a long hub, and cammeans fixed on the hub for raising and lowering the building lever.

5. In a builder mechanism vfor a spinning L frame, a building lever, atrundle roll adjustably secured to the lever, a filling cam engaging thetrundle roll to effect oscillation of the lever, a filling arm pivotallysecured in the `building `lever and Vresponsive .to oscillation of thelever,

a filling arm cam for controlling the traverse of the lill-ing arm, apick actuated motion including a pick wheel and a driven shaft forvarying the position Yof the said filling arm cam, disengageable gearmeans for increasing the speed of rotation of the driven shaft, timingcam means for placing the gear means in an operative position for ashort interval, and cam means for causing the building lever to moveinto a top bunch building position during the said interval.

6. In a builder mechanism for a vspinning frameva building lever, atrundle roll adjustably secured to the lever, a f lli-ng cam engagingthe trundle roll -to effect oscillation of the lever, a filling armpivoted in the building lever and responsive to .oscillation thereof, a`lli-ng a-rm cam for controlling the traverse of the filling arm, a pick`actuated motion including .a pick wheel and driven shaft for varyingthe posi- -tion of said filling arm cam, disengageable gear means forincreasing Ithe speed of rotation of the driven shaft, timing cam `meansfor placing the gear means in an loperative position for a shortinterval, cam `means for causing the building lever to move into a topbunch building position Yduring the said interval, said latter cam meansbeing arranged on a cam support rotated in timed relation to the fillingarm cam. 7. In a builder mechanism for a spinning -frame a buildinglever, a trundle roll adjustbuilding lever to move into a top bunchbuilding position during the said interval, said latter cam means beingarranged on a cam support rotated in timed relation to the filling armcam, and a builder lowering cam positioned on the said cam supportbetween the filling arm cam and the timing cam means.

8. In a builder mechanism a building lever pivotally mounted on a shaft,a bracket secured in spaced relation to the lever, a filling arm and apivot means therefor for rotatively supporting the arm between the leverand bracket, means for oscillating the lever, a supporting shaftextending between the bracket and theA lever, and cam means mounted onthe supporting shaft for selectively controlling movement of both thebuilding lever and filling arm.

9. In a builder mechanism for building a top bunch of filling, thecombination with a building lever of a supporting member, cam meanssecured between the lever and supporting member for controlling movementof the lever, said cam means including a pair of discs having rimportions in symmetrically opposed relationship to one another, said rimportions being cut away to define widened slots at a part of thecircumference thereof, cani portions formed on the inner surfaces of thediscs adjacent the said slots, and a timing arm adapted to engage saiddiscs.

10. A builder mechanism for a spinning frame comprising a shaft, abuilding lever mounted on the shaft, means consisting of a trundle rolland filling cam for oscillating the building lever on the shaft, asupporting member arranged in spaced relation to the building lever, cammeans secured between the building lever and supporting means for movingthe building lever into a top bunch building position, and cam means forbuilding a reserve bunch of filling after the top bunch has been formed.

ll. A builder mechanism for a spinning frame comprising a shaft, abuilding lever mounted on the shaft, means consisting of a trundle rolland filling cam for oscillating the building lever on the shaft, asupporting member arranged in spaced relation to the building lever,cani means secured between the building lever and supporting means formoving the building lever into a top bunch building position, and meansfor forming several turnsY of filling about the lower end of the bobbin.

l2. A builder mechanism for a spinning frame comprising a shaft, abuilding lever mounted on the shaft, means consisting of a trundle rolland filling cam for oscillating the building lever on the shaft, asupporting member arranged in spaced relation to the building lever, cammeans secured between the building lever and supporting means for movingthe building lever into a top bunch building position, means for formingseveral turns of filling about the lower end of the bobbin, and meansfor forming ar reserve bunch o-f filling.

13. In a builder mechanism a building lever pivotally mounted on ashaft, a bracket secured in spaced relation to the building lever, afilling arm and a pivot means therefor for rotatively supporting the armbetween the lever and bracket, means for oscillating the lever, a shaftextending between the bracket and the lever, cam means for controllingmovement of the building lever, said cam means including a pair oftiming discs and a timing arm operatively positioned to be controlled bythe discs, and means for securing the arm in a locked position.

14. In a builder mechanism a building lever pivotally mounted on ashaft, a bracket secured in spaced relation to the building lever, afilling arm and a pivot means therefor for rotatively supporting the armbetween the lever and bracket, means for oscillating the lever, a shaftextending between the bracket and the lever, cam means for controllingmovement of Vthe building lever, said cam means including a pair oftiming discs and a timing arm operatively positioned to be controlled bythe discs, means for securing the arm in a locked position comprising alatch means, and a trip for said latch means for disengaging the timingarm from its locked position.

l5. A builder mechanism for a spinning frame comprising a building levermounted on a shaft in the spinning frame, a trundle roll secured to thelever, filling cam means supported from the spinning frame, said llingcam being adapted to engage against the trundle roll and effectoscillation of the lever about its shaft, a filling arm connected by adraft chain to lifter means for a ring rail in the said spinning frame,said filling arm being responsive to movement of the building lever, ashaft supported for rotation in the building lever and driven by a pickactuated motion, a worm mounted on the shaft, a worm wheel in mesh withthe worm, a cam stud on which said worm wheel is mounted, said cam studbeing supported at one end by the building lever, a bracket memberattached to the other end of said stud, a filling arm cam rotatable onthe cam stud and being attached to the worm wheel and effective upon thelling arm for changing its traverse relatively to movement of thebuilding lever, gear means effective when in mesh for increasing thespeed of the said shaft, and means comprising a cam element functioningupon said filling arm and control means therefor for moving the fillingarm into an elevated position during atleast a part of the relativelyfaster rotation of the driven shaft when said gears are in mesh, therebyto build a top bunch.

16. In a builder mechanism a shaft, a building lever pivotally mountedthereon, a bracket and means for securing said bracket in spacedrelation to the lever, a lling arm rotatively supported between thebracket and the lever, and means including a traverse cam foroscillating the lever, said means for securing the bracket to thebuilding lever including a shaft Yextending between the bracket and thelever, means for controlling the relative movements of the buildinglever and filling arm comprising cams mounted on the said shaft andincluding a pair of timing discs defining between them a slot of variedwidth', a timing arm operatively connected for action upon and betweensaid discs, and means affected by said timing arm and including a pickactuated motion and disengageable gears for driving said pick actuatedmotion at predetermined points in the cycle of operation of the saidbuilder mechanism.

17. In a builder mechanism a building lever and a pivotal mountingtherefor, a bracket and means including a shaft xed at one end to thelever and at its other end to the bracket for maintaining the saidbracket and lever in spaced relation, aiilling arm and a pivot thereforadjacent the pivot for the building lever, cam means forming a drivenunit on said shaft and including a timing cam, a filling arm controllingcam and a cam for moving the entire build'- er mechanism downwardly forwinding a tail about a completed yarn package and for positioning thering rail for winding a bunch at a point adjacent the lower end of thebobbin, and a pick actuated motion for rotating said cams.

18. In a builder mechanism a building lever and a pivotal mountingtherefor, a bracket and means including a shaft xed at one end to thelever and at its other end to the bracket for maintaining the saidbracket and lever in spaced relation, a filling arm and a pivot thereforadjacent the pivot for the building lever, cam means forming a drivenunit on said shaft and including a timing cam, a filling arm controllingcam and a cam for moving the entire builder mechanism downwardly forwinding a tail about a completed yarn package and for positioning thering rail for winding a bunch at a point adjacent the lower end of thebobbin, and means for rotating said cams comprising a pick shaft, a wormon said pick shaft and a worm Wheel fixed for rotation with said camsand driven by said worm, pick means for rotating said pick shaft at aslow speed and gears and means controlled by said timing cam forintermeshing said gears at predetermined times to rotate said cams at afaster speed,

19. In a builder mechanism a building lever, a pivot about which saidlever is mounted for swinging movement, a rotatable traverse cam and atrundle roll carried by said building lever and positioned to be engagedby said traverse cam for swinging the lever about its pivot during thebuilding of the body portion of a thread package, said trundle rollbeing mounted on a second lever pivoted to the said building lever, andmeans for varying the relative position of said trundle roll withrespect to the builder mechanism thereby to alter the eiect of thetraverse cam thereon which comprises a cam, means to rotate said cam intimed relation to the package building function, foilower meansengageable with said cam, and a third lever to which said follower meansis attached, said third lever being interconnected through to said leverupon which the trundle roll is mounted for imparting the controlmovement derived from said cam to the trundle roll mounting lever.

20. In a builder mechanism a building lever, a pivot about which saidlever is mounted for movement, a rotatable traverse cam and a trundleroll carried by said buil-ding lever and positioned to be engaged bysaid traverse cam for moving the lever about its pivot, a movablemounting means for said trundle roll, said mounting means beingcomprised as a functional part of the building lever, and means formoving the said mounting for the trundle roll to diiferent positionswith respect to the building lever in one of which the said roll iswithdrawn from its usual proximity to the traverse cam, said means formoving the mounting as described comprising a cam, drive mea-ns for thecam and means for imparting movement of the cam to the mounting meanswhich comprises a lever, a follower on said lever engageable by said camand means movable by said lever and follower and interconnected to thesaid mounting means.

21. In a builder mechanism a building lever, a pivot about which saidlever is mounted for swinging movement, a rotatable traverse cam and atrundle roll carried by said building lever and positioned to be engagedby said traverse cam for swinging the lever about its pivot, saidtrundle roll being mounted on a second 1ever pivoted to the saidbuilding lever, and means for varying the position of said rollrelatively to the building mechanism thereby to alter the effect of thetraverse cam thereon which comprises a cam carried by the builder lever,pick actuated means for rotating saidV cam, disengageable gears fordriving said pick actuated means at predetermined times and followermeans bearing upon said cam and interconnected to the said lever uponwhich the trundle roll is mounted for imparting the control derived fromthe cam to the movable mounting means.

22. In a builder mechanism of the type described, a building lever and apivotal mounting therefor, a trundle roll carried by said buildinglever, a filling cam engageable with said trundle roll for swinging saidbuilding lever about its pivot to effect traversing of a yarn as it isWound to form a yarn package, and means effective upon termination ofwinding the yarn package for raising the traverse of the yarn toward theend of the package to wind a tip bunch slightly removed from the end ofthe main body of the yarn package, said means for winding a tip bunchcomprising a cam, a. pivot means carried by said builder lever uponwhich said cam is rotatable, pick actuated means for rotating said cam,a second pivot means carried by said builder lever, arms pivoted at saidsecond pivot means, one of which carries a follower means resting onsaid cam and the other of which is effective upon said trundle roll tovary its position relatively to the building lever, timing cams andtiming control means to govern the point in the cycle at which thetrundle roll varying means becomes eiective thereby to determine thepoint at which said tip bunch shall be formed and latch means governingthe timing control means for preventing the start of formation of thetip bunch except during an upstroke of the traverse of the yarn.

GEORGE E. REPASS.

REFERENCES CITED The following references are of record in the iile ofthis patent:

UNITED STATES PATENTS Number Name Date 1,397,905 Rhoades Nov. 22, 19211,797,353 Lyle Mar. 4, 1931 2,025,672 Repass Dec. 24, 1935 2,695,214Furtado, Jr. Oct. 5, 1937 2,254,178 Holcombe Aug. 25, 1941 2,274,446Heald Feb. 24, 1942

